Twin sheets – Twice as good

TwinSheet in real.

Twin Sheet combines vacuum forming and pressure forming (High Pressure) by forming and welding two sheets together in the same process. The method produces a hollow, sealed product without the use of adhesive or other jointing techniques.

The Twin Sheet process gives 3D parts with surfaces according to specification. Typical properties for a Twin Sheet product are strength and rigidity combined with low weight. Twin Sheet products can also be filled inside with foam.

Common applications

Typical areas of use are pallets, containers for medical equipment, different types of cabinet, leisure equipment, ventilation products and many parts for aeroplanes, cars and trains.

How does it work?

In TwinSheet forming heat and vacuum are used to form two thermoplastic sheets onto a tool fitted with two moulding semi-segments.

1. Vacuum forming tool

The tool is placed in the TwinSheet machine. The sheets are inserted.

2. Heating

The sheets to be formed are heated from above and below to between +170-210°C

3. Vacuum forming

Using the vacuum the plastic material is formed in the forming tools. The edges are welded together in the same process.

4. Cooling

Once the sheet has been moulded it is cooled and is then ready for after-machining.